US3437861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas filled cold cathode indicator tube
Assignee: Japan Radio Co Ltd
•
Filing: 1966-02-14
•
Granted: 1969-04-08
•
Expires: 1986-02-14
Abstract
No abstract record available.
Inventors
- 👤 Michio Koshizuka
- 👤 Naoji Ohfuji
- 👤 Shinetsu Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:32
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J2893/00; H01J2893/0069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1456505A
Cited
US1649975A
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US1589483A
Cited
US1991767A
Cited
US2618760A
Cited
US2783408A
Cited
US2991388A
Cited
US3260882A
Cited
GB947015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |